You're right about fricking, Threeb. It's in quite a few dictionaries these days, and its use is fairly widespread. And, RM, you're correct in saying the word has been around for quite a while. Apparently Partridge listed it in 1937 in his slang dictionary, so it must have already been in use for some time before that.
As for eastside, I think the case is not so strong, as it seems to be written as two words most of the time. Likewise with westside, etc - Leonard Bernstein wrote West Side Story, not Westside Story. However, the form eastside is occasionally used, and is listed in a couple of dictionaries, so I think it ought to be allowed. And for similar reasons, and for the sake of consistency, westside, northside and southside will be accepted too.